1986 cj7 help - JeepForum.com
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post #1 of 8 Old 09-24-2017, 02:47 PM Thread Starter
Avalanche724
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Unhappy 1986 cj7 help

so i just bought a 1986 jeep CJ7 just a couple of days ago guy i bought it off of let her sit for a couple of years and it definitely shows. so far i have done a compression test, changed the spark plugs, changed the spark plug wires, and changed the fuel filter. but to cut to the chase the engine will turn over but wont stay on and idle and i have to spray a little carburetor cleaner inside the carburetor to get her to start. I've gotten recomedations to drop the gas tank and clean the lines all the way up to the carb and change the fuel pump. trying to see if theres anyone thats had the same problem and know a good starting point to go at the problem remind you this is my first rebuild ever so im learning as i go. any help is appreciated.

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post #2 of 8 Old 09-24-2017, 03:21 PM
TIPPEDITOVER
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Been sitting a couple years? Today's gasoline doesn't like to sit untreated very long. So that's the first consideration. With the ethanol they like to put in the gasoline, you will find a light grey powder/sand inside the float bowl, blocking passageways inside the carburetor.

Ok so to diagnose,

Pull the fuel line off the carb, run a line into a clear container. Have someone crank the engine while you watch how much fuel comes out. Plenty? Then the fuel tank, fuel pump, fuel lines is not the direction to look.

Then it's time to remove the carb and get inside. Soak it and clean it out very well. That's what I would do anyway.

Shaun

1978 CJ5 to CJ6 - Build in progress......


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post #3 of 8 Old 09-24-2017, 05:42 PM
SAVRICH
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x2 ^

Clean & inspect carb, especially if its a Carter. Check the idle, tune it. All that good stuff
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post #4 of 8 Old 09-24-2017, 09:26 PM Thread Starter
Avalanche724
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thanks @TIPPEDITOVER and @SAVRICH i will rip out the carb first thing in the morning.
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post #5 of 8 Old 09-25-2017, 02:45 AM
keith460
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As mentioned above, clean the carburetor and or rebuild it. 1986 model year will have the Carter BBD w/Stepper Motor. They are notorious for having clogged Idle Tubes over time that cause rough idle or the ability to not idle at all.

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post #6 of 8 Old 09-26-2017, 09:12 AM Thread Starter
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one guy wants me to drop the tank and clean all the lines going to the carb first
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post #7 of 8 Old 09-26-2017, 09:35 AM
TIPPEDITOVER
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He and you should realize how easy it is to disconnect the fuel line from the carb, run it into a container and crank the engine. If fuel comes out the line then you would be wasting your time dropping the tank and messing with the fuel lines.

Shaun

1978 CJ5 to CJ6 - Build in progress......


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post #8 of 8 Old 09-27-2017, 08:19 AM
SAVRICH
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^x2 much easier. do it as you remove the carb

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